[Matt Devo]

Hi All (but mostly Matt),

I'm in a bit of a jam... my chromebox has been working nicely for so long that I forgot exactly what I did to set it up and I now need to make some changes.
It's an Asus (haswell) chromebox setup using Matt's script in a dual boot configuration.
When I turn it on I get a blue screen with 3 icons for the 3 possible bootable partitions - sda1 (EFI) sda2 (LibreElec) sda3 (Lubuntu Zesty).
There doesn't seem to be any trace of ChromeOS left on it.
I need to either re-install the OS on sda3 (replace w/ a more recent version of lubuntu or even Gallium) OR just convert it back to a pure libreelec box (the lubuntu install is fried and hangs on boot).
I have tried to generate recovery media to perform a factory reset using the chrome store recovery app but it fails at the same spot in step 3 on 4 different brands of USB sticks in multiple ports and 2 different brands of SDcard via 2 different adapters.... I can only assume it doesn't like my PC.
Does anyone have any suggestions that might help me move forward?

As always huge thanks to Matt for the amazing work he's done... I love my chromebox and I honestly don't know what I'll do when it dies.

TC

since you are already running my UEFI firmware, ChromeOS recovery mode no longer exists, and recovery media is useless (unless you were to restore the stock firmware). At this point, you can simply create UEFI bootable install media for whatever OS you want, boot it, and do a clean install. I would go ahead and update to the latest UEFI firmware as well, once you have a bootable Linux ISO or install.